1887

Abstract

Three Gram-positive, aerobic, non-motile, mesophilic strains, designated 2-25(1), 2-29(17) and 2-70(23), were isolated from sandy soil from Chokoria, Cox's Bazar, Bangladesh. The organisms produce short chains of non-motile spores that emerge singly or in tufts from vegetative hyphae on the surface of agar media. A comparative phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolates formed a distinct clade within the evolutionary radiation of the family and clustered with members of the genus . The nearest neighbours were subsp. and subsp. . Chemotaxonomic data, such as the presence of - and 3-hydroxy-diaminopimelic acids, -glycolyl type muramic acid, arabinose and xylose and glucose in whole-cell hydrolysates, phosphatidylethanolamine as a diagnostic phospholipid, a tetrahydrogenated menaquinone with 9 isoprene units as a major menaquinone and fatty acid profiles predominated by iso-branched hexadecanoic acid and iso-branched pentadecanoic acid, supported the affiliation of the novel isolates to the genus . The results of DNA–DNA hybridization and physiological and biochemical tests allowed the novel isolates to be differentiated genotypically and phenotypically from the three recognized species. The three isolates therefore represent novel species for which the names sp. nov. [type strain 2-25(1)=JCM 12950=DSM 44900], sp. nov. [type strain 2-29(17)=JCM 12951=DSM 44901] and sp. nov. [type strain 2-70(23)=JCM 12949=DSM 44899], are proposed. DNA–DNA hybridization tests with subsp. and subsp. , in combination with chemotaxonomic and physiological data, demonstrated that subsp. should be elevated to a separate species for which the name sp. nov., comb. nov. is proposed (type strain JCM 7543=DSM 44098).

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2006-02-01
2019-12-09
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vol. , part 2, pp. 393 - 400

Scanning electron micrographs of sp. nov., sp. nov. and sp. nov. [PDF](540 KB)



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